Qaitbay Citadel, Alexandria, Egypt
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Ancient sources place completion under Ptolemy II around 280 BCE, per the World History[3] Encyclopedia and Britannica; the exact year is not precisely recorded.The Pharos of Alexandria, one of the Seven Wonders of the Ancient World, was completed under Ptolemy II to guide ships into the city's Great Harbor. Commissioned by Ptolemy I and built by the architect Sostratus of Cnidus, the tower stood for over 1,600 years.
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